Turns out Yashima was a short-lived camera company, founded in 1976 and bankrupt by 1980. It was set up by Ushiyama Jisaburō a brother of Ushiyama Yoshimasa the founder of an earlier Yashima company who change name to Yashica in 1958. One would have to ask if he was trading on his brother's name LD
Impossible to value, maybe of interest to a Japanese collector, but whatever an over inflated price, but perhaps more than a similar more common camera.
Ian